Experience purchasing a used high-end cartridge

I am saying that inspection by a competent disinterested professional third party is what I would require if I were to buy a pre-owned megabuck cartridge. Speaking for myself only. I guess you don't agree, and that is fine.

No, I agree that I would need your criteria met if I were to buy this hypothetical used cartridge. How many times can I say go for it? I don’t buy used cartridges so the point is moot, but I’m submitting to your hypothetical. But I also think this transaction is unlikely to occur in reality. Most sellers like a glide path, not additional complication and risk. Additional shipping is a risk. And how many sellers do you think would say, sure, here’s my cartridge, have an expert vouch for it, however long that takes, while I don’t sell it to anyone else. And Peter can take months to do work. Could happen. Sure why not. Once again, go for it.

I've bought 2 used cartridges from my local dealer, Sounds Of Silence, with terrible excitement and always the items were as described. No issues just good music.

One of the few things I never have and never will buy used.